{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.8"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "9771e9aaebbfbb5633ce69eb9876e0fc70bbcd6f"
            }
          ],
          "repo": "https://github.com/contiki-ng/contiki-ng",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-m737-4vx6-pfqp"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-120"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28116.json"
  },
  "details": "Contiki-NG is an open-source, cross-platform operating system for internet of things (IoT) devices. In versions 4.8 and prior, an out-of-bounds write can occur in the BLE L2CAP module of the Contiki-NG operating system.  The network stack of Contiki-NG uses a global buffer (packetbuf) for processing of packets, with the size of PACKETBUF_SIZE. In particular, when using the BLE L2CAP module with the default configuration, the PACKETBUF_SIZE value becomes larger then the actual size of the packetbuf.  When large packets are processed by the L2CAP module, a buffer overflow can therefore occur when copying the packet data to the packetbuf. The vulnerability has been patched in the \"develop\" branch of Contiki-NG, and will be included in release 4.9. The problem can be worked around by applying the patch manually.",
  "id": "CVE-2023-28116",
  "modified": "2026-04-01T23:10:05.399395423Z",
  "published": "2023-03-17T21:22:54.703Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28116.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-m737-4vx6-pfqp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-28116"
    },
    {
      "type": "FIX",
      "url": "https://github.com/contiki-ng/contiki-ng/pull/2398"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Buffer overflow in L2CAP due to misconfigured MTU"
}